package com.lagou.homework;

import java.io.IOException;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.IntWritable;
import org.apache.hadoop.mapreduce.Job;
//import org.apache.hadoop.mapreduce.lib.input.CombineTextInputFormat;
import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;

public class HwDriver {
    public static void main(String[] args) throws IOException, ClassNotFoundException, InterruptedException {
// 1 获取配置信息以及封装任务
        Configuration configuration = new Configuration();
        Job job = Job.getInstance(configuration);
// 2 设置jar加载路径
        job.setJarByClass(HwDriver.class);
// 3 设置map和reduce类
        job.setMapperClass(HwMapper.class);
        job.setReducerClass(HwReducer.class);
// 4 设置map输出
        job.setMapOutputKeyClass(IntWritable.class);
        job.setMapOutputValueClass(IntWritable.class);
// 5 设置最终输出kv类型
        job.setOutputKeyClass(IntWritable.class);
        job.setOutputValueClass(IntWritable.class);
// 6 设置输入和输出路径
        FileInputFormat.setInputPaths(job, new Path("src/main/resources/input/"));
        FileOutputFormat.setOutputPath(job, new Path("src/main/resources/output/"));
// 7 指定inputformat
//        job.setInputFormatClass(CombineTextInputFormat.class);

// 8 提交
        boolean result = job.waitForCompletion(true);
        System.exit(result ? 0 : 1);
    }
}